Search Results for Tag: ice
Greenland on the horizon
When I first visited Greenland back in 2009, it was not a place that made the news very often. This summer, as I prepare for another visit, I have been reading, hearing and viewing quite a bit about Greenland recently – and most of it was alarming.
Dark news from the white island
“Sea level fears as Greenland darkens” was the headline of a piece by David Shukman for the BBC. It reports on the findings of the “Black and Bloom” research project, looking at how increasing algae blooms through climate warming are darkening the ice sheet, meaning it absorbs more heat from the sun instead of reflecting it back into space.
Scientists are keenly observing the cracking of Greenland’s Petermann glacier. It has not made headlines on the same scale as the giant Larsen C iceberg in the Antarctic, but scientists tell us it is highly significant in terms of impacts clearly attributable to climate change. On Twitter, @Petermann_Ice provides regular updates. NSIDC provides daily information on the Greenland ice sheet in general.
Earlier this summer, a tsunami played havoc and caused loss of life in a small settlement on the west coast of the island. Ice melt is now thought to have played a key role.
Faraway Greenland a global concern
While I don’t grudge the beautiful ice island the media attention, the reason it has been making headlines is a huge cause for concern. Climate change is melting the massive ice sheet increasingly fast, involving feedback effects which are hard to predict, and already affecting global sea level and weather patterns.
With this year’s UN climate conference, scheduled to be held right next to our DW headquarters here in Bonn, looming large on the horizon in three months time, I will be paying a visit to the icy island to see first-hand how climate change is affecting Greenland and the people who live there, and what scientists are finding out about the state of the northern hemisphere’s biggest body of freshwater. The massive ice sheet that (still) covers 80 percent of the world’s biggest island has the potential to increase global sea levels by 7 meters, if it were to melt completely.
Now while that extreme is not something I worry about happening any time soon, I am concerned that the ice is melting ever faster and already contributing more to sea rise than it used to, with clear consequences for low lying coastal areas in many parts of the world. Even that massive ice sheet, more than three kilometers thick at its highest point, which has covered Greenland for two to three million years, is not safe from our human-induced global warming.
Lucky for some?
Of course the Greenlanders themselves are experiencing considerable changes to the environment they live in. The sea ice they relied on has dwindled in summer, shortening the time when it can be used as a reliable platform for people to travel from place to place by dog sled or snowmobile. Thawing permafrost is creating problems for some buildings. Traditional hunters and fishermen are having to change their lifestyles.
At the same time, given the harsh conditions in Greenland, especially in winter, it’s not hard to understand why some Greenlanders are not too upset about the climate getting a bit warmer. Grow more fruit and veggies. Earn revenue from easier mining, shipping, drilling – maybe enough to fund complete independence from Greenland? The worries of small island states in the Pacific may well seem a world away. But there is no escaping the fact that melting Greenland ice is raising sea level and changing weather patterns all over the globe, even in unlikely places like Africa.
So – it’s time for the Iceblogger to get the gear ready. The ice island is getting warmer. But I won’t pack my bikini for this trip. There has been a lot of snow this summer. I hear the occasional sceptic saying, “see, more snow. Where’s your warming?” I am happy to refer them to expert Jason Box:
Climate Central also takes up the subject.
Yes, climate warming is in this case resulting in more snow. At least the field reports from “Eastgrip”, the East Greenland Ice-Core Project, tell me that means there are fewer mosquitos around. Think positive.
I will be heading first to Kangerlussuaq, the departure point for expeditions to the ‘”inland ice” of Greenland at the weekend. Look out for a post from there some time soon.
DateAugust 3, 2017 | 12:52 pm
DateJune 23, 2017 | 2:22 pm
Greenland earthquake and tsunami – hazards of melting ice?
Following the news over the weekend with a trip to Greenland this summer at the back of my mind, my attention was immediately caught by reports of a tsunami and earthquake in Greenland. Four people were reported missing. Buildings had been swept away, including the power station on the island of Nuugaatsiaq. Greenland is not the first place that comes to mind in connection with earthquakes and tsunamis. But in fact they are not as rare as you might think.
The cause of the weekend’s event is still unclear. But a tweet from the Greenland Climate Research Centre links to an article in the Washington Post from June 25 2015:
The article reports on a paper published in the journal Science at that time by researchers from Swansea University in the UK, the Lamont-Doherty Earth Observatory at Columbia University and several other institutions. It says the loss of Greenland’s ice can generate “glacial earthquakes”.
“When vast icebergs break off at the end of tidal glaciers, they tumble in the water and jam the glaciers themselves backwards. The result is a seismic event detectable across the Earth”.
Worrying reading indeed, as GCRC wrote in their tweet.
The Washington Post article quoted Meredith Nettles from Columbia, one of the co-authors.
She specifically mentions the tsunami effect:
“The tsunami is caused because the iceberg has to move a lot of water out of the way as it tips over”.
Too early to say
I have been trying to find more information on what the experts think caused this weekend’s particular event. So far, there is no clarity. But the GCRC tweet with link to the Washington Post article seems to indicate they think it could be ice-related.
Another theory is that the quake and tsunami were caused by a landslide. The news agency DPA says the Geological Survey of Denmark and Greenland are still trying to determine the cause of the tsunami.
“Initially, geologists believed it was triggered by an earthquake, but another theory blamed a large landslide from one of the mountains on the fjord system”.
It seems the Danish Arctic Commando published images showing signs of an extensive landslide.
“Tsunamis and large waves at times affect Greenland’s coasts, but, according to the Geological Survey, they are usually caused by landslides and the breaking off of ice from melting glaciers”, the agency writes.
DPA earlier noted that the Danish earthquake authority GEUS had recorded a 4.0 quake.
Warning from Greenland ice cores
One way or other, the weekend tsunami is unlikely to allay anxiety about the effects of rapidly melting substantial quantities of ice.
And a study just published by Germany’s Alfred-Wegener-Institute (AWI) provides more food for thought about human-induced changes to our climate. It indicates that the gradual nature of the changes we are making to the CO2 concentration in the atmosphere is no guarantee that the resulting climate change will also be gradual. On the contrary. Computer models based on information from ice cores from Greenland show that in high latitudes of the northern hemisphere, there were abrupt changes in climate, which the scientists attribute to a gradual increase in CO2.
During the last ice age, they say that the influence of atmospheric CO2 on the North Atlantic Current within a few decades led to an increase in temperature of up to 10 degrees Celsius in Greenland. The study, published in the journal Nature Geoscience, by scientists from AWI and the University of Cardiff shows that in recent earth history, there have been situations when gradual increases in CO2 concentrations at what are known as “tipping points” led to abrupt changes in ocean circulation and climate.
Sudden warm age on the horizon?
Lead author Xu Zhang says the study is the first to prove that a gradual increase in CO2 can set off very rapid warming, based on interactions between ocean currents and the atmosphere.
The authors also show that the rise in CO2 is the main cause of chances in ocean currents during the transition from an ice age to a warm period.
Of course, they add, the framework conditions today are different from those during an ice age, so it is not possible to say the rise in CO2 will have similar effects in future.
But they say they can definitely show that there were abrupt climate changes in Earth’s history, which can be traced back to continual rises in CO2 concentrations.
Reason enough for concern to people living on the coast of Greenland – not to mention the rest of us, given the key role the world’s biggest island, with the biggest freshwater mass in the northern hemisphere sitting on top of it in the form a giant ice sheet, plays in influencing climate and sea levels around the globe?
DateJune 19, 2017 | 3:12 pm
TagsArctic, AWI, Climate, CO2, earthquake, Emissions, glaciers, Greenland, ice, ice age, research, science, Sea level, tsunami
Working for an international broadcaster which has Africa as one of its key target groups, I often find it difficult to interest some of my colleagues in what is happening in the Arctic. So my attention was caught instantly when I came across an article by Chelsea Harvey in the Washington Post: A climate chain reaction: Major Greenland melting could devastate crops in Africa.
DateJune 9, 2017 | 11:17 am
Tags#saveOurOceans, Africa, Arctic, Climate, Greenland, ice, ocean acidification, Renewables, research, science, Sea level, UN talks, Warming
Cheap oil from the Arctic? Fake news, says climate economist Kemfert
This week I came across an interesting publication about to come on to the German market.
“The fossil empire strikes back” (Das fossile Imperium schlägt zurück) is the translation of the catchy title of a new book in German by Professor Claudia Kemfert, head of the department of energy, transportation and environment at the German Institute for Economic Research in Berlin (DIW Berlin,) and professor of energy and sustainability at the Hertie School of Governance, in Berlin.
She has also acted as advisor to the German government, the European Commission and is on the steering committee of the renowned Club of Rome.
A fossil fuels revival: happening now, or alternative facts?
I called her up to record an interview for our Living Planet radio show to find out what was behind the headline, and the sub-title: “why we have to defend the “Energiewende” (energy transition) now.
Prof Kemfert believes the fossil fuels sector is really working hard at making a comeback. That, she says, is not fake news, but the fossils lobby makes use of the latter in its attempt to turn the clock back in terms of energy production.
While the global transition towards renewable energy has been successful in recent years, with the costs of alternative energies reduced, the Paris Agreement signed and ratified, now, she says, the fossil fuels sector is striking back.
She says they do it by spreading fake news, creating myths about restrictions on cars, speed limits, blackouts, globally, but especially in the USA under the Trump administration. So, she argues, we have to defend the energy transformation. The window of opportunity for climate action is still open, but we are losing time.
The power of fake news
Kemfert’s aim is to debunk the myths, which she is convinced are being used to give renewable energy a bad image. Some of the examples she cited to me are false claims that renewables are more expensive, or that reliance on alternative energies will mean blackouts.
“This has never happened in Germany”, she notes, the country that gave the “Energiewende” its name and pressed ahead with the transition to renewables in recent years.
So how can fake news of this kind make such an impact that Kemfert and other like-minded experts are worried about an oil and coal revival?
“If you repeat this all the time, and repeat it on social media, people think it’s true”, she told me.
“The danger is that they can be successful”.
“The global energy transition is in danger”, she is convinced. “We are losing time to bring greenhouse gases down and help the planet to survive.
“The lobby of the fossil empire is extremely strong… the whole campaign with myths and fake news is really successful, because a lot of people believe what they say”.
So are the fossil fuel lobbyists just better at getting a message across than the other side? There could be something to that, Kemfert agreed. She says the “green lobby” is not aggressive enough. People think “we are the good ones, the energy transition comes by itself”- this is not true. Now it’s time to fight for it”.
Time to march?
She calls on all scientists and people who want to protect free and democratic science, to take part in the Marches for Science, planned to take place round the globe on April 22nd.
Of course I wanted to know how she thought the global counter-attack by the “fossil empire” would impact the Arctic.
Yes, she said, this push for a fossil fuels revival could provide additional motivation to those who would like to push ahead with Arctic drilling, as climate change makes for easier and less expensive access:
“There are some aggressive industries, especially coming from the oil and gas sector, who have interest to drill for oil in the Arctic region.
For them, she says, easier access thanks to climate change would be “a nice, so-to-say side effect”.
But for the planet as a whole, climate change is so dangerous that any potential short-time business benefits are just not worth thinking about, says Claudia Kemfert:
“As a climate economist, I cannot say this (oil from the Arctic) makes economic sense, because the costs of climate change are much higher than lower costs, for example, for drilling oil in the Arctic. The costs of global climate change are so high that it cannot outweigh the cost reduction of oil drilling in the Arctic when there’s low ice. We have to move away from oil and gas, this is why it’s more economically efficient to go for an energy transition instead of drilling in areas where we have climate impacts, we are causing environmental difficulties and where we know that burning these fossil fuels will create climate change. That’s really the wrong way to go”.
Kemfert’s book is only being published in German at the moment, but there is more info on her home page, and a longer version of the English interview I conducted with her will be coming up soon on Living Planet and on the DW website.
DateApril 13, 2017 | 12:38 pm
TagsArctic, Climate, CO2, DIW, Emissions, Energiewende, ice, Kemfert, Oil, Renewables, science, Science march, Warming